Question

Bn геометрическая пргрессия bn:1;5;25... найдите b5

Answer 1

B1 = 1
b2 = 5
q = b2/b1 = 5

b5 = b1*q^4 = 1*5^4 = 625

Answer 2

B1=1,b2=5,b3=25, b5=?
q=b2/b1=b3/b2=b4/b3=......
q=5/1=5
q=5
b5=b1.qˇ4
b5=1.5ˇ4=1.625=625
b5=625
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(b4=b3.q=25.5=125, b5=b4.q=125.5=625)

Answer 3

Geometric Progression and Finding b5

A geometric progression is a sequence of numbers where each term is found by multiplying the previous term by a constant factor called the common ratio. In this case, we have the geometric progression bn: 1, 5, 25...

To find b5, we need to determine the value of the fifth term in the sequence.

According to the search results, we have the following information:

- Source states that b1 = 7 and bn + 1 = 3bn. - Source mentions bn+1 = bn + 5.

Based on this information, we can calculate the value of b5.

Using the information from Source we can determine the value of b2, b3, and b4:

- b2 = 3b1 = 3 * 7 = 21 - b3 = 3b2 = 3 * 21 = 63 - b4 = 3b3 = 3 * 63 = 189

Now, using the information from Source we can calculate b5:

- bn+1 = bn + 5 - b4+1 = b4 + 5 - b5 = 189 + 5 = 194

Therefore, the value of b5 in the geometric progression bn: 1, 5, 25... is 194.

Please let me know if there's anything else I can help you with!